Home / 21,221.28-29,284.32-11,790.44

Finding the Fourth Proportional to 21,221.28, 29,284.32 and 11,790.44

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Solution

The fourth proportional to 21,221.28, 29,284.32 and 11,790.44 is: 16,270.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.28 : 29,284.32 = 11,790.44 : x
  2. Step 2: Convert to fraction form
    21,221.28/29,284.32 = 11,790.44/x
  3. Step 3: Cross multiply
    21,221.28x = 29,284.32 × 11,790.44
  4. Step 4: Simplify right side
    21,221.28x = 345,275,017.90
  5. Step 5: Solve for x
    x = 345,275,017.90/21,221.28
  6. Step 6: Final answer
    x = 16,270.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.